Discussion

4. Discussion
Explain what your goal was for each step (What did you hope to remove from the water?) and discuss its success/failure based on your results.

• For our first step, the goal of just using filter paper was to remove the visible dirt and the oil from the water. To our knowledge, this was successful, as the oil was removed and caught in the filter and so was the dirt. There was no more of either remaining in the water mixture. The next step, which involved putting sand in the filter and then pouring the water into it, didn't work as we expected. We thought the sand would clear up the water a lot and hopefully get rid of the rancid smell, but it didn't; it only took away a little bit of the color. Our next step involved a filter and putting charcoal in it. We believed this would completely clear the water up. When the water was filtered out into the graduated cylinder, it wasn't perfectly clear. So, for our fourth step, we did exactly what we did in step three (poured charcoal into the filter and then poured the water into it), and the water was completely cleared up after this and didn't really smell.

Describe and explain/justify any procedural changes from your introduction (Did you change/skip/add any procedures? Why ? Are you satisfied that this was the right thing to do Why or why not?)

• No, our introduction stated that our goal was to purify the water and make it drinkable. We assumed that the water also had oils, dirt, various chemicals, and vinegar. These were all of the things we tried to filter out from the water during the procedures. We didn't change any procedures because we were just experimenting with various materials ( charcoal, sand..etc) and were trying to find what was the best method at removing the excess materials from the water. I think it was the right thing to keep our procedures the same, because we based them off of logic and research and we ruled out what couldn't work, and what had a possibility to work.